mosquitto | 易学教程

App, service and mqtt crashes when wifi disconnects and wont reconnect

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I'm making an app with a mqtt client and a background service that makes a notification when I get certain mqtt message. I use Paho library and service as the client and everything works perfectly as long as I am connected to wifi and the broker is on. I don't want access to the broker over internet so when no wifi is available the client is disconnected, the problem is that when the wifi connects again the mqtt client wont reconnect. I have tried many things but the latest test was to make a handler check if there is internet and if its via wifi, and if it is I start the mqtt server again. I

How to compile using libmosquitto

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问题 Iam trying to compile the code example available on the libmosquitto website (at the bottom): http://mosquitto.org/man/libmosquitto-3.html Iam using Ubuntu 12.04 and I've installed libmosquitto1 and libmosquitto1-dev packages. Before installing them I added the mosquitto repository: sudo apt-add-repository ppa:mosquitto-dev/mosquitto-ppa sudo apt-get update Iam trying to compile the example as follows: gcc -lmosquitto mosquito.c -o mosquito But I get the following errors: /tmp/cc6eU8kw.o: In

mosquitto/openssl 在RK3288上的编译以及MQTT客户端的代码示例

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1，依赖库openssl 的交叉编译（1）配置编译器信息 setarch i386 ./config no-asm shared --cross-compile-prefix=arm-linux-androideabi- （2）修改Makefile 删除-m32 （3）编译（指定编译器） make CC=arm-linux-androideabi-gcc CXX=arm-linux-androideabi-g++ 2，mosquitto 的交叉编译 (1)修改该config.mk WITH_STATIC_LIBRARIES:=yes CFLAGS += -I/where_is_your_openssl_headerfiles/ LDFLAGS += -L/where_is_your_openssl_staticlib/ (2)编译 make CC=arm-linux-androideabi-gcc CXX=arm-linux-androideabi-g++ 3，基于mosquitto的MQTT client 代码中struct mqtt_conf是自定义结构，mqtt_send是一个双向链表实现的队列。 void start_mqtt_module(struct mqtt_conf *conf) { if (!conf->server || conf->server_port <

How to run mosquitto mqtt broker on openshift online

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Has anybody successfully run mosquitto on the openshift online version in a free account ? There are two SO questions relevant but not really solve all the questions: "How to connect to my MQTT Broker in Openshift" . It runs JBoss Fuse and needs either the SNI feature on the server or the port-forwarding on the client. "How can I access socket through Openshift" . The author mentions running mosquitto but there is no details as to how. Stuffs that have been done so far: I have run a python websocket server thus to have verified openshift does support websocket nicely though the DIY cartridge.

Mosquitto 上建立到 EMQ X 的桥接

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EMQ X 节点可以被其他类型的 MQTT 消息中间件桥接，实现跨平台的消息订阅和发送。本文我们以一个配置实例来说明如何配置 Mosquitto 到 EMQ X 的桥接。 Mosquitto 是一个小型轻量的开源 MQTT Broker，由 C/C++ 语言编写。Mosquitto 采用单核心单线程架构，支持部署在资源有限的嵌入式设备，接入少量 MQTT 设备终端，并实现了 MQTT 5.0 和 3.1.1版本协议。 EMQ X 与 Mosquitto 均完整支持了 MQTT 协议特性，但 EMQ X 支持更多通信协议以及私有协议接入。应用层的功能拓展方面，Mosquitto 缺乏开箱即用的如认证鉴权、规则引擎、数据持久化与高性能消息桥接（EMQ X 企业版）等业务相关功能；监控运维与可视化管理方面， EMQ X 有完整的现有功能和拓展方案支持；基础功能上 Mosquitto 集群功能羸弱，官方和第三方实现的集群方案均难以支撑物联网大规模海量连接的性能需求。因此 Mosquitto 并不适合用来做规模化服务的 MQTT Broker，但由于其足够轻量精简，可以运行在任何低功率单片机包括嵌入式传感器、手机设备、嵌入式微处理器上，是物联网边缘消息接入较好的技术选型，结合其桥接功能可以实现消息的本地处理与云端透传。场景描述假设我们有一个 EMQ X 服务器集群 emqx1

How can I access socket through Openshift

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问题 I register in the Openshift.com and create a catridge. But when I need to deploy Mosquitto, a MQTT Server, which is accessed through tcp or ssl protocol, and I need visit from public IP. Does Openshift just redirect http/https protocol through 80/443 port to 8080? Is it possible to use socket communcation in Openshift? I have created two applications in Openshift, one for push and the other for web deployment, and I stopped the apache service in order to let the mosquitto service listen to

Mosquitto的安装、配置、测试

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Mosquitto是一个开源(BSD许可证)的消息代理，实现MQTT(消息队列遥测传输)协议版本3.1。 MQTT（MQ Telemetry Transport），消息队列遥测传输协议，轻量级的发布/订阅协议，适用于一些条件比较苛刻的环境，进行低带宽、不可靠或间歇性的通信。值得一提的是mqtt提供三种不同质量的消息服务： “至多一次”，消息发布完全依赖底层 TCP/IP 网络。会发生消息丢失或重复。这一级别可用于如下情况，环境传感器数据，丢失一次读记录无所谓，因为不久后还会有第二次发送。 “至少一次”，确保消息到达，但消息重复可能会发生。 “只有一次”，确保消息到达一次。这一级别可用于如下情况，在计费系统中，消息重复或丢失会导致不正确的结果。方法一：传统源码安装在Linux系统上安装Mosquitto，本人建议大家使用源码安装模式，最新的源码可从 http://mosquitto.org/files/source/ 地址中获取。解压之后，我们可以在源码目录里面找到主要的配置文件config.mk，其中包含了所有Mosquitto的安装选项，详细的参数说明如下： # 是否支持tcpd/libwrap功能. #WITH_WRAP:=yes # 是否开启SSL/TLS支持 #WITH_TLS:=yes # 是否开启TLS/PSK支持 #WITH_TLS_PSK:=yes #

Mosquitto的安装、配置、测试

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Cluster forming with Mosquitto broker

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问题 I am using Mosquitto broker to implement MQTT protocol. But I am unable to find how clustering can be done in case of mosquitto brokers. Also is there any limitation on number of clients those can be served with one broker. 回答1: You can't do clustering with mosquitto. Some other MQTT brokers out there which support clustering, including HiveMQ. HiveMQ has an elastic cluster ability with auto discovery and a distributed masterless architecture and works very well on cloud providers like AWS or

How do you set up encrypted mosquitto broker like a webpage which has https?

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I'm trying to setup a mosquitto broker which is encrypted using ssl/tls. I don't want to generate client certificates. I just want an encrypted connection. The man page only described the settings which are available, not which are needed and how they are used. Which settings are needed and how do you set them? I use mosquitto 1.3.5 Gussoh There is a small guide here, but it does not say much: http://mosquitto.org/man/mosquitto-tls-7.html You need to set these: certfile keyfile cafile They can be generated with the commands in the link above. But easier is to use this script: https://github

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